Checks overview
GET /v1/check runs the same validators as the dedicated /v1/check/* routes. Pass kind and number (or value / q).
Supported kinds: iban, vat, nino, nhs, isbn, luhn, plate.
These endpoints validate format and checksum rules only. They do not call live HMRC, DVLA, or bank registers.
Try it
https://fetch.li/v1/check?kind=iban&number=GB82WEST12345698765432
Dedicated pages: IBAN, VAT, NINO, NHS, ISBN, Luhn, plate.
Demo
GET endpoints work without an API key on the public demo tier (60 calls per hour per IP).
Try it
GET https://fetch.li/v1/check
Answer
Response